UTF-8 text is garbled when form is posted as multipart form-data

Question

I m uploading a file to the server  The file upload HTML form has 2 fields   File name - A HTML text box where the user can give a name in any language   File upload  - A HTMl  file  where user can specify a file from disk to upload   When the form is submitted  the file contents are received properly  However  when the file name  point 1 above  is read  it is garbled  ASCII characters are displayed properly  When the name is given in some other language  German  French etc    there are problems   In the servlet method  the request s character encoding is set to UTF-8  I even tried doing a filter as mentioned - How can I make this code to submit a UTF-8 form textarea with jQuery Ajax work  - but it doesn t seem to work  Only the filename seems to be garbled   The MySQL table where the file name goes supports UTF-8  I gave random non-English characters  amp  they are stored displayed properly   Using Fiddler  I monitored the request  amp  all the POST data is passed correctly  I m trying to identify how where the data could get garbled  Any help will be greatly appreciated

User · Answer

I had the same problem  The only solution that worked for me was adding   lt property    defaultEncoding  value    UTF-8  gt  to multipartResoler in spring configurations file

User · Answer

I had the same problem and it turned out that in addition to specifying the encoding in the Filter  request setCharacterEncoding  UTF-8    response setCharacterEncoding  UTF-8      it is necessary to add  acceptcharset  to the form   lt form method  post  enctype  multipart form-data  acceptcharset  UTF-8   gt     and run the JVM with   -Dfile encoding UTF-8   The HTML meta tag is not necessary if you send it in the HTTP header using response setCharacterEncoding

User · Answer

Just use Apache commons upload library  Add URIEncoding  UTF-8  to Tomcat s connector  and use FileItem getString  UTF-8   instead of FileItem getString   without charset specified   Hope this help

User · Answer

I m using org apache commons fileupload servlet ServletFileUpload ServletFileUpload FileItemFactory  and defining the encoding when reading out parameter value   List lt FileItem gt  items   new ServletFileUpload new DiskFileItemFactory    parseRequest request    for  FileItem item   items        String fieldName   item getFieldName         if  item isFormField              String fieldValue   item getString  UTF-8        lt -- HERE

User · Answer

I had the same problem using Apache commons-fileupload  I did not find out what causes the problems especially because I have the UTF-8 encoding in the following places  1  HTML meta tag 2  Form accept-charset attribute 3  Tomcat filter on every request that sets the  UTF-8  encoding  -  My solution was to especially convert Strings from ISO-8859-1  or whatever is the default encoding of your platform  to UTF-8   new String  s getBytes   iso-8859-1     UTF-8      hope that helps  Edit  starting with Java 7 you can also use the following   new String  s getBytes  StandardCharsets ISO 8859 1   StandardCharsets UTF 8

User · Answer

You also have to make sure that your encoding filter  org springframework web filter CharacterEncodingFilter  in your web xml is mapped before the multipart filter  org springframework web multipart support MultipartFilter

User · Answer

The filter thing and setting up Tomcat to support UTF-8 URIs is only important if you re passing the via the URL s query string  as you would with a HTTP GET  If you re using a POST  with a query string in the HTTP message s body  what s important is going to be the content-type of the request and this will be up to the browser to set the content-type to UTF-8 and send the content with that encoding   The only way to really do this is by telling the browser that you can only accept UTF-8 by setting the Accept-Charset header on every response to  UTF-8 q 1 ISO-8859-1 q 0 6   This will put UTF-8 as the best quality and the default charset  ISO-8859-1  as acceptable  but a lower quality   When you say the file name is garbled  is it garbled in the HttpServletRequest getParameter s return value

User · Answer

You do not use UTF-8 to encode text data for HTML forms  The html standard defines two encodings  and the relevant part of that standard is here  The  old  encoding  than handles ascii  is application x-www-form-urlencoded  The new one  that works properly  is multipart form-data   Specifically  the form declaration looks like this     lt FORM action  http   server com cgi handle         enctype  multipart form-data         method  post  gt      lt P gt     What is your name   lt INPUT type  text  name  submit-name  gt  lt BR gt     What files are you sending   lt INPUT type  file  name  files  gt  lt BR gt      lt INPUT type  submit  value  Send  gt   lt INPUT type  reset  gt    lt  FORM gt    And I think that s all you have to worry about - the webserver should handle it  If you are writing something that directly reads the InputStream from the web client  then you will need to read RFC 2045 and RFC 2046

User · Answer

The filter is key for IE  A few other things to check   What is the page encoding and character set  Both should be UTF-8   lt    page language  java  contentType  text html  charset UTF-8  pageEncoding  UTF-8   gt    What is the character set in the meta tag    lt meta http-equiv  Content-Type  content  text html  charset UTF-8    gt    Does your MySQL connection string specify UTF-8  e g   jdbc mysql   127 0 0 1 dbname requireSSL false amp useUnicode true amp characterEncoding UTF-8

User · Answer

To avoid converting all request parameters manually to UTF-8  you can define a method annotated with  InitBinder in your controller    InitBinder protected void initBinder WebDataBinder binder        binder registerCustomEditor String class  new CharacterEditor true             Override         public void setAsText String text  throws IllegalArgumentException               String properText   new String text getBytes StandardCharsets ISO 8859 1   StandardCharsets UTF 8               setValue properText                         The above will automatically convert all request parameters to UTF-8 in the controller where it is defined

User · Answer

In case someone stumbled upon this problem when working on Grails  or pure Spring  web application  here is the post that helped me   http   forum spring io forum spring-projects web 2491-solved-character-encoding-and-multipart-forms  To set default encoding to UTF-8  instead of the ISO-8859-1  for multipart requests  I added the following code in resources groovy  Spring DSL    multipartResolver ContentLengthAwareCommonsMultipartResolver        defaultEncoding    UTF-8

User · Answer

I think i am late for the party but when you use a wildfly  you can add an default-encoding to the standalone xml  Just search in the standalone xml for     lt servlet-container name  default  gt     and add encoding like this    lt servlet-container name  default  default-encoding  UTF-8  gt

User · Answer

I am using Primefaces with glassfish and SQL Server    in my case i created the Webfilter  in back-end  to get every request and convert to UTF-8  like this   package br com teste filter   import java io IOException   import javax servlet FilterChain  import javax servlet FilterConfig  import javax servlet ServletException  import javax servlet ServletRequest  import javax servlet ServletResponse  import javax servlet annotation WebFilter    WebFilter servletNames   Faces Servlet    public class Filter implements javax servlet Filter         Override     public void destroy                TODO Auto-generated method stub              Override     public void doFilter ServletRequest request  ServletResponse response              FilterChain chain  throws IOException  ServletException           request setCharacterEncoding  UTF-8            chain doFilter request  response                     Override     public void init FilterConfig filterConfig  throws ServletException              TODO Auto-generated method stub                  In the View   xhtml  i need to set the enctype paremeter s form to UTF-8 like  Kevin Rahe        lt h form id  frmt  enctype  multipart form-data charset UTF-8   gt            lt  -- your code here -- gt       lt  h form gt

User · Answer

I got stuck with this problem and found that it was the order of the call to request setCharacterEncoding  quot UTF-8 quot     that was causing the problem  It has to be called before any all call to request getParameter    so I made a special filter to use at the top of my filter chain  https   rogerkeays com servletrequest-setcharactercoding-ignored

[java] UTF-8 text is garbled when form is posted as multipart/form-data

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